feat: day 02

Cargo.toml

@@ -14,6 +14,7 @@ test_lib = []
 
 [dependencies]
 itertools = "0.12.0"
+lazy_static = "1.4.0"
 pico-args = "0.5.0"
 rayon = "1.8.0"
 regex = "1.10.2"

README.md

@@ -18,7 +18,8 @@ Solutions for [Advent of Code](https://adventofcode.com/) in [Rust](https://www.
 
 | Day | Part 1 | Part 2 |
 | :---: | :---: | :---:  |
-| [Day 1](./src/bin/01.rs) | `26.0µs` | `753.8µs` |
+| [Day 1](./src/bin/01.rs) | `28.0µs` | `747.5µs` |
+| [Day 2](./src/bin/02.rs) | `154.3µs` | `151.2µs` |
 
-**Total: 0.78ms**
+**Total: 1.08ms**
 <!--- benchmarking table --->

data/examples/02.txt

@@ -0,0 +1,5 @@
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green

data/inputs/02.txt

@@ -0,0 +1,100 @@
+Game 1: 1 green, 2 blue; 15 blue, 12 red, 2 green; 4 red, 6 blue; 10 blue, 8 red; 3 red, 12 blue; 1 green, 12 red, 8 blue
+Game 2: 5 green, 2 red, 18 blue; 18 blue, 6 red, 9 green; 6 blue, 3 green; 6 green, 1 red, 9 blue; 19 blue, 2 green, 6 red
+Game 3: 16 red, 10 green; 12 red, 6 blue, 9 green; 10 green, 5 blue; 10 green, 16 red; 5 red, 8 green, 8 blue
+Game 4: 9 blue, 20 green; 1 red, 3 blue, 10 green; 7 blue, 18 green; 4 blue, 20 green; 8 blue, 1 green, 1 red; 1 green
+Game 5: 3 green, 8 red; 1 blue, 10 red; 6 red, 4 green; 8 red, 1 blue, 3 green; 1 blue, 4 green, 3 red; 1 green, 1 blue, 4 red
+Game 6: 7 green, 15 red, 11 blue; 2 red, 12 blue; 11 red, 11 green
+Game 7: 14 green, 10 blue, 4 red; 3 red, 11 green, 14 blue; 1 red, 2 green, 11 blue; 9 green, 1 red; 6 red, 6 blue, 9 green
+Game 8: 1 red, 6 green, 3 blue; 4 green; 4 red, 3 green, 1 blue; 2 red, 10 green, 3 blue; 2 green, 6 red, 3 blue
+Game 9: 2 green, 8 red, 3 blue; 2 green, 4 blue, 2 red; 2 green, 5 blue, 2 red
+Game 10: 9 green, 1 blue; 2 blue, 12 green, 3 red; 2 red, 3 blue, 1 green; 3 blue, 8 green; 4 blue, 4 red, 1 green; 5 green, 4 blue
+Game 11: 5 red, 2 blue, 2 green; 3 blue, 2 green, 8 red; 6 red, 1 green
+Game 12: 8 blue, 7 green; 2 green, 2 red, 7 blue; 4 green, 1 red, 20 blue; 5 green, 13 blue, 2 red
+Game 13: 1 blue, 11 green, 13 red; 6 blue, 13 red, 19 green; 5 blue, 6 green, 6 red
+Game 14: 12 blue, 1 red, 15 green; 16 green; 1 red, 18 blue, 15 green; 14 blue; 12 blue, 1 red, 8 green; 4 blue, 16 green
+Game 15: 6 blue, 3 green; 1 red, 1 blue, 2 green; 3 green, 4 blue, 7 red
+Game 16: 17 red, 14 green, 6 blue; 5 blue, 2 red; 1 blue, 11 red, 2 green; 13 green, 12 red
+Game 17: 14 green, 4 red; 1 green, 5 blue, 15 red; 5 green, 14 red, 5 blue
+Game 18: 8 blue, 2 green, 1 red; 12 blue, 1 green; 1 green, 1 red, 5 blue; 1 green, 1 red, 9 blue
+Game 19: 1 red, 2 blue; 2 green, 5 red; 1 blue, 2 green, 11 red; 10 red; 4 green, 11 red
+Game 20: 5 red, 11 green, 5 blue; 2 red, 5 blue, 7 green; 12 blue, 5 green, 10 red; 4 blue, 15 red, 10 green; 11 green, 12 blue, 7 red; 15 red, 12 blue, 5 green
+Game 21: 5 blue, 6 green, 1 red; 18 blue, 13 green; 7 blue, 3 red; 9 blue, 2 red, 14 green
+Game 22: 4 blue, 2 green, 19 red; 11 green, 5 blue, 17 red; 12 red, 4 blue, 13 green; 2 blue, 11 green; 1 blue, 19 red, 10 green; 8 blue, 2 green
+Game 23: 12 green, 6 red; 1 blue, 1 red, 11 green; 1 blue, 3 red, 8 green; 4 green, 8 red
+Game 24: 8 blue, 1 green, 6 red; 6 blue, 9 red; 8 red, 1 green, 1 blue
+Game 25: 2 red, 4 blue, 1 green; 1 blue, 4 red, 2 green; 1 green, 5 blue, 1 red; 3 red, 2 blue
+Game 26: 2 green, 10 blue, 5 red; 14 blue, 6 green, 12 red; 7 green, 2 red, 1 blue; 3 blue, 5 green, 3 red; 7 blue, 1 red, 3 green; 5 red, 2 green, 6 blue
+Game 27: 8 blue, 2 red; 2 green, 8 blue, 6 red; 4 green, 2 red; 2 blue, 4 green, 7 red
+Game 28: 8 green; 1 red, 9 blue, 10 green; 8 green, 9 blue, 2 red
+Game 29: 5 red, 3 green, 2 blue; 12 red, 6 blue, 1 green; 6 red, 12 blue; 2 green, 4 blue, 5 red
+Game 30: 9 red, 1 blue, 2 green; 13 green, 12 blue, 11 red; 11 red, 5 green, 9 blue; 4 blue, 12 green, 3 red; 10 red, 8 green; 2 red, 3 blue, 12 green
+Game 31: 11 green, 5 red; 1 green, 4 red; 6 green, 9 red, 2 blue
+Game 32: 6 blue, 3 red; 2 red, 11 blue, 4 green; 1 green, 4 red, 12 blue; 3 blue, 2 red
+Game 33: 1 green, 7 red; 15 red, 15 green, 1 blue; 15 green, 3 red; 1 blue, 13 green, 6 red; 1 blue, 13 green, 20 red
+Game 34: 3 red, 5 green, 1 blue; 13 green, 5 blue, 2 red; 3 red, 3 blue, 8 green; 3 blue, 1 red, 1 green; 4 blue, 3 red; 9 green, 3 red
+Game 35: 6 blue, 8 green; 6 red, 9 blue, 12 green; 4 green, 3 blue; 5 red, 3 blue
+Game 36: 17 green, 1 red, 1 blue; 1 red, 7 blue, 13 green; 6 blue, 5 green; 9 blue, 6 red, 5 green
+Game 37: 2 green, 16 blue, 1 red; 3 red, 5 blue, 4 green; 3 green, 5 red, 2 blue
+Game 38: 10 red, 3 blue, 1 green; 2 blue, 4 red; 7 red, 1 blue; 8 blue, 5 red, 11 green; 12 green, 4 blue, 8 red
+Game 39: 3 blue, 3 green, 1 red; 5 green, 9 blue; 1 green, 6 blue; 5 blue, 7 green, 1 red; 9 blue, 1 green
+Game 40: 1 blue, 2 red, 2 green; 2 green, 14 blue; 2 red, 6 blue; 13 blue; 2 green, 10 blue
+Game 41: 1 red, 1 blue, 1 green; 11 green, 1 red; 4 green; 5 green; 1 blue, 1 red, 10 green
+Game 42: 4 blue, 3 red, 2 green; 6 red, 1 blue, 6 green; 11 red, 7 blue, 3 green; 6 blue, 7 red, 1 green; 11 red, 1 green, 6 blue; 2 blue, 4 green, 10 red
+Game 43: 3 red, 5 blue; 2 green, 4 red, 3 blue; 7 red, 10 blue, 13 green
+Game 44: 13 green, 5 blue, 3 red; 1 green, 5 blue, 8 red; 11 green, 4 blue, 9 red; 5 blue, 7 green, 9 red
+Game 45: 12 red, 9 blue, 5 green; 9 green, 3 red; 3 green, 11 blue, 15 red
+Game 46: 5 blue, 2 green, 1 red; 1 blue, 3 red, 3 green; 2 green, 7 blue
+Game 47: 8 red, 8 green, 5 blue; 12 blue, 8 green, 7 red; 5 red, 1 blue, 2 green; 1 red, 4 green, 6 blue; 1 red, 3 blue; 5 green, 1 red, 3 blue
+Game 48: 3 blue, 2 red, 5 green; 4 green, 5 blue; 3 blue, 13 green, 5 red
+Game 49: 4 red, 9 blue, 1 green; 12 red, 8 blue; 5 red, 2 blue, 1 green; 11 red, 2 green, 9 blue; 8 red, 9 blue, 3 green
+Game 50: 3 blue, 2 red; 3 blue, 7 green; 4 red, 2 blue, 8 green; 7 green, 2 blue, 4 red; 3 red, 3 green; 6 green, 4 red, 2 blue
+Game 51: 9 blue, 4 red, 2 green; 5 red, 3 green, 3 blue; 5 green, 10 blue, 5 red; 8 red, 11 blue, 5 green; 1 red, 3 blue, 7 green
+Game 52: 1 blue, 9 red, 6 green; 8 red, 1 blue, 4 green; 13 green, 3 blue, 6 red; 3 green, 9 red; 3 blue, 12 green, 7 red
+Game 53: 1 blue, 9 green; 1 red, 2 green; 7 green, 1 red
+Game 54: 3 green, 3 blue, 9 red; 6 blue, 11 green, 1 red; 6 green, 1 red, 4 blue; 4 blue, 2 red, 13 green; 3 green, 1 red; 6 blue, 3 green, 8 red
+Game 55: 1 blue, 6 green; 4 red, 5 green; 8 red, 12 green; 5 red, 1 blue, 7 green; 1 blue, 11 red, 3 green
+Game 56: 1 green, 11 red, 1 blue; 2 green, 8 blue, 3 red; 5 blue, 6 red, 1 green
+Game 57: 5 green, 3 red, 2 blue; 10 green, 12 blue, 16 red; 7 blue, 13 red, 11 green
+Game 58: 5 green, 16 blue, 5 red; 9 blue, 2 green, 5 red; 5 blue, 3 red, 9 green
+Game 59: 2 blue, 2 red; 7 blue, 3 green, 4 red; 2 green, 1 blue
+Game 60: 12 red, 5 green, 1 blue; 2 blue, 12 red, 4 green; 16 red, 4 green, 2 blue
+Game 61: 3 green, 1 blue, 6 red; 4 green, 1 blue, 8 red; 4 red, 1 blue, 1 green; 4 green, 13 red
+Game 62: 2 red, 4 blue; 2 blue, 13 green, 8 red; 4 red, 9 green, 4 blue; 8 green, 3 red, 7 blue; 3 blue, 6 red, 3 green
+Game 63: 1 green, 3 blue; 6 blue, 4 red, 3 green; 3 blue, 1 green, 1 red; 2 green, 2 blue, 3 red; 1 red, 2 blue; 5 red, 6 blue
+Game 64: 7 red, 10 blue, 4 green; 1 green, 18 red, 2 blue; 7 blue, 2 green; 10 red, 1 green, 7 blue; 3 green, 5 blue, 11 red
+Game 65: 11 red, 2 blue; 1 green, 2 blue, 1 red; 3 blue, 2 green, 3 red; 3 blue, 3 red, 7 green
+Game 66: 3 red, 7 blue, 11 green; 10 blue, 4 green, 9 red; 11 blue, 11 red, 12 green; 8 red, 7 blue, 10 green; 5 red, 14 green, 3 blue
+Game 67: 5 green, 1 red; 7 green, 4 blue; 3 red, 1 green, 3 blue
+Game 68: 9 blue, 11 green, 10 red; 12 blue, 3 red, 3 green; 8 red, 7 green, 9 blue
+Game 69: 1 green, 7 blue, 1 red; 1 red, 9 blue; 1 green, 2 red
+Game 70: 9 green, 2 blue, 1 red; 1 red, 2 blue, 16 green; 13 green, 4 blue, 13 red; 8 red, 7 green, 6 blue; 12 green, 3 blue, 3 red
+Game 71: 2 green, 4 red, 6 blue; 11 green, 6 blue, 2 red; 3 green, 1 blue, 5 red; 7 blue, 6 green
+Game 72: 4 blue, 1 green; 4 blue; 1 green, 3 blue; 4 blue; 1 red, 4 blue; 3 blue
+Game 73: 4 red, 1 green, 7 blue; 15 green, 4 blue, 17 red; 19 green, 3 blue, 11 red; 13 green, 5 blue, 1 red; 10 blue, 13 green, 17 red
+Game 74: 9 green, 2 blue, 18 red; 5 red, 8 green; 3 green, 4 blue, 3 red; 5 green, 3 blue
+Game 75: 1 red, 10 blue, 1 green; 2 red, 19 blue; 4 red, 10 blue; 3 red, 7 blue, 1 green; 2 red, 3 blue
+Game 76: 4 green, 9 red, 7 blue; 8 green, 7 blue; 12 green, 9 red
+Game 77: 1 red, 6 blue, 2 green; 8 red, 5 green, 4 blue; 4 blue, 2 red, 3 green
+Game 78: 9 blue, 1 red, 8 green; 2 green, 9 blue; 2 green, 9 blue
+Game 79: 4 blue, 4 green, 1 red; 4 blue, 4 red, 4 green; 4 green, 1 blue, 6 red; 6 green; 6 red
+Game 80: 13 red, 8 blue; 2 green, 14 red, 13 blue; 7 red, 9 blue; 11 red, 18 blue; 2 blue, 3 red, 1 green
+Game 81: 2 green, 9 red, 12 blue; 5 green, 5 red, 13 blue; 5 blue, 5 red; 2 red, 8 blue
+Game 82: 6 red, 15 green; 1 blue, 15 red, 13 green; 6 green, 1 blue, 1 red; 5 red, 6 green, 1 blue
+Game 83: 1 green; 1 blue, 1 green, 10 red; 7 red, 1 blue; 1 green, 11 red; 2 blue, 1 green, 3 red
+Game 84: 17 green, 8 red; 1 blue, 14 green, 2 red; 6 red, 1 blue, 6 green; 4 red, 10 green, 1 blue; 2 red, 2 blue, 1 green; 4 blue, 5 green, 3 red
+Game 85: 5 blue, 3 red; 1 blue, 1 green; 6 green, 1 blue, 1 red; 4 green, 2 blue, 7 red
+Game 86: 7 red, 3 blue, 4 green; 1 blue, 13 red; 3 red, 3 blue, 6 green; 1 blue, 1 green, 17 red; 8 blue, 13 red, 4 green; 6 blue, 4 green, 17 red
+Game 87: 10 red, 3 green, 4 blue; 12 green, 10 red, 3 blue; 2 green, 16 red; 16 red, 3 blue, 14 green; 14 green, 11 red, 1 blue; 9 red, 4 blue, 6 green
+Game 88: 7 green, 4 red, 19 blue; 1 green, 5 red, 18 blue; 19 blue, 3 green, 6 red; 9 green, 14 blue, 5 red; 3 green, 5 red
+Game 89: 4 red, 2 blue, 10 green; 6 blue, 5 red; 3 green, 4 blue, 1 red; 12 green, 2 red, 2 blue; 3 blue, 3 green, 3 red
+Game 90: 1 green, 19 red, 1 blue; 7 blue, 4 green, 10 red; 6 blue, 3 green, 13 red
+Game 91: 1 green, 9 blue; 7 green, 4 red, 3 blue; 6 green, 2 red, 8 blue; 1 red, 1 blue; 3 red, 2 green
+Game 92: 18 red, 2 green, 2 blue; 6 blue, 4 red, 6 green; 3 blue, 10 red; 8 blue, 2 green, 7 red
+Game 93: 13 blue, 3 green, 15 red; 14 red, 2 green, 7 blue; 1 blue, 4 green, 13 red; 19 red, 5 green
+Game 94: 6 blue; 5 green, 8 blue; 1 red, 9 blue; 1 red, 8 blue; 5 green, 6 blue; 1 red
+Game 95: 9 blue, 14 green; 2 green, 1 red, 1 blue; 1 red, 3 green, 2 blue; 6 green, 1 red; 1 red, 8 blue, 14 green; 1 green, 5 blue
+Game 96: 7 blue, 17 green; 19 green, 3 red, 2 blue; 6 green, 2 red, 2 blue; 3 blue, 16 green; 3 red, 20 green; 4 green, 2 blue
+Game 97: 1 green, 1 red, 1 blue; 4 red, 2 blue; 7 red; 6 red; 7 red
+Game 98: 2 red, 15 green; 10 green, 1 red; 1 red, 11 blue, 11 green; 13 blue, 8 green, 2 red; 1 red, 12 green, 7 blue
+Game 99: 14 red, 2 blue, 1 green; 3 green, 13 red, 9 blue; 9 red, 9 blue, 2 green; 13 red, 7 green, 5 blue; 5 blue, 3 green, 11 red
+Game 100: 1 blue, 1 red, 1 green; 8 blue, 1 green; 1 green, 7 blue, 1 red; 1 green, 4 blue, 1 red; 1 green, 3 blue

data/puzzles/02.md

@@ -0,0 +1,37 @@
+\--- Day 2: Cube Conundrum ---
+----------
+
+You're launched high into the atmosphere! The apex of your trajectory just barely reaches the surface of a large island floating in the sky. You gently land in a fluffy pile of leaves. It's quite cold, but you don't see much snow. An Elf runs over to greet you.
+
+The Elf explains that you've arrived at *Snow Island* and apologizes for the lack of snow. He'll be happy to explain the situation, but it's a bit of a walk, so you have some time. They don't get many visitors up here; would you like to play a game in the meantime?
+
+As you walk, the Elf shows you a small bag and some cubes which are either red, green, or blue. Each time you play this game, he will hide a secret number of cubes of each color in the bag, and your goal is to figure out information about the number of cubes.
+
+To get information, once a bag has been loaded with cubes, the Elf will reach into the bag, grab a handful of random cubes, show them to you, and then put them back in the bag. He'll do this a few times per game.
+
+You play several games and record the information from each game (your puzzle input). Each game is listed with its ID number (like the `11` in `Game 11: ...`) followed by a semicolon-separated list of subsets of cubes that were revealed from the bag (like `3 red, 5 green, 4 blue`).
+
+For example, the record of a few games might look like this:
+
+```
+Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
+Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
+Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
+Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
+
+```
+
+In game 1, three sets of cubes are revealed from the bag (and then put back again). The first set is 3 blue cubes and 4 red cubes; the second set is 1 red cube, 2 green cubes, and 6 blue cubes; the third set is only 2 green cubes.
+
+The Elf would first like to know which games would have been possible if the bag contained *only 12 red cubes, 13 green cubes, and 14 blue cubes*?
+
+In the example above, games 1, 2, and 5 would have been *possible* if the bag had been loaded with that configuration. However, game 3 would have been *impossible* because at one point the Elf showed you 20 red cubes at once; similarly, game 4 would also have been *impossible* because the Elf showed you 15 blue cubes at once. If you add up the IDs of the games that would have been possible, you get `*8*`.
+
+Determine which games would have been possible if the bag had been loaded with only 12 red cubes, 13 green cubes, and 14 blue cubes. *What is the sum of the IDs of those games?*
+
+To begin, [get your puzzle input](2/input).
+
+Answer:
+
+You can also [Shareon [Twitter](https://twitter.com/intent/tweet?text=%22Cube+Conundrum%22+%2D+Day+2+%2D+Advent+of+Code+2023&url=https%3A%2F%2Fadventofcode%2Ecom%2F2023%2Fday%2F2&related=ericwastl&hashtags=AdventOfCode) [Mastodon](javascript:void(0);)] this puzzle.

src/bin/02.rs

@@ -0,0 +1,119 @@
+#[macro_use]
+extern crate lazy_static;
+
+use regex::Regex;
+use std::collections::HashMap;
+advent_of_code::solution!(2);
+
+lazy_static! {
+    pub static ref MAX_COUNTS: HashMap<&'static str, u32> = {
+        [("red", 12), ("green", 13), ("blue", 14)]
+            .iter()
+            .cloned()
+            .collect()
+    };
+    pub static ref CUBE_COUNT_RE: Regex = Regex::new(r"(\d+) (red|green|blue)").unwrap();
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+enum Cube {
+    Red,
+    Green,
+    Blue,
+}
+
+impl Cube {
+    fn from_str(s: &str) -> Option<Self> {
+        match s {
+            "red" => Some(Cube::Red),
+            "green" => Some(Cube::Green),
+            "blue" => Some(Cube::Blue),
+            _ => None,
+        }
+    }
+}
+
+/// No, not GameCube™, but the maximum count of each colored cube across
+/// all subsets within a unique game.
+#[derive(Default, Debug)]
+struct GameCubeCounts {
+    red: u32,
+    green: u32,
+    blue: u32,
+}
+
+impl GameCubeCounts {
+    fn update_max_count(&mut self, color: Cube, count: u32) {
+        match color {
+            Cube::Red => self.red = self.red.max(count),
+            Cube::Green => self.green = self.green.max(count),
+            Cube::Blue => self.blue = self.blue.max(count),
+        }
+    }
+
+    /// Determines if the cubes revealed for each color does not exceed the available cubes
+    fn is_game_possible(&self) -> bool {
+        self.red <= 12 && self.green <= 13 && self.blue <= 14
+    }
+
+    /// The fewest cubes required to satisfy a game is the power of the count of each cube per color
+    fn fewest_cubes_required(&self) -> u32 {
+        self.red * self.green * self.blue
+    }
+}
+
+/// Calculates the max number of cubes revealed per color across all subsets within a given game.
+fn count_max_cubes_revealed(input: &str) -> GameCubeCounts {
+    let mut counts = GameCubeCounts::default();
+
+    for capture in CUBE_COUNT_RE.captures_iter(input) {
+        if let (Some(count_match), Some(color_match)) = (capture.get(1), capture.get(2)) {
+            let count = count_match.as_str().parse::<u32>().unwrap_or(0);
+            if let Some(color) = Cube::from_str(color_match.as_str()) {
+                counts.update_max_count(color, count);
+            }
+        }
+    }
+
+    counts
+}
+
+pub fn part_one(input: &str) -> Option<u32> {
+    input
+        .lines()
+        .enumerate()
+        .filter_map(|(index, game)| {
+            let counts = count_max_cubes_revealed(game);
+            if counts.is_game_possible() {
+                Some(index as u32 + 1)
+            } else {
+                None
+            }
+        })
+        .sum::<u32>()
+        .into()
+}
+pub fn part_two(input: &str) -> Option<u32> {
+    input
+        .lines()
+        .map(|game| count_max_cubes_revealed(game).fewest_cubes_required())
+        .sum::<u32>()
+        .into()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let result = part_one(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, Some(8));
+    }
+
+    #[test]
+    fn test_part_two() {
+        let result = part_two(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, Some(2286));
+    }
+}